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My tuner pulled logs and sent them to COBB for further analysis, however they think it's the Deatschwerks 1000cc injectors.

I don't know the exact details from a technical stand-point, but my tuner said he encountered a similar issue with another STI running ID 1000cc injectors (different brand).

How it happens:

If I'm driving casually / lightly (less than 25% throttle), it'll bog for a very split second between 2800-3000 rpms. Once it's past 3000 rpms, there are no further issues.

If I press the throttle harder than 25% to about 90%, the bogging / misfiring become more evident and VERY frustrating. If I'm WOT, the nose of the car drops when it reaches 2800-3000rpm then picks up and carries on (from an outsider, it'll look like I'm "shifting").

So are there any known issues with running 1000cc injectors with these cars? What should I do next?